A modified bingo card is shown in the figure. The numbers 111 are found under the letter B, 1226 under the letter I, 2740 under the letter N, 4159 under the letter G, and 6073 under the letter O. The center space on the card is labeled "FREE." How many different columns are possible under the letter O ? Hint: the order in which the numbers are found in each column is important in bingo..